Analysts have said he could spend 15 to 20 years in prison after being convicted on 20 of 21 counts of felony offenses related to bribery.

In a 34-page filing, lead federal prosecutor Matt Coman said Nagin knew about the bribery scheme and knew he was betraying public trust.

In the filing, Coman asked Berrigan to sentence Nagin to more prison time than other well-known public corruption officials, such as former Detroit Mayor Kwame Kilpatrick and former Illinois Gov. Rod Blagojevich.

Kilpatrick received a 28-year sentence and Blagojevich received 14 years.

In the filing, Coman said, “Nagin's widespread and corrosive breach of the public trust lasting throughout much of his tenure in office equals even the worse of these state and local corruption cases. Accordingly Nagin's criminal conduct calls for a similar significant sentence of imprisonment in keeping with the cited public corruption cases."

Nagin remains in Dallas and will be back in New Orleans for his sentencing.

Stay tuned to WDSU.com and WDSU-TV for more information as it develops.

NEW ORLEANS MAYOR RAY NAGIN. IN A 34 PAGE FILING - THEY SAY NAGIN LIED ON THE STAND DURING HIS TRIAL, RAN AND ORGANIZED A BRIBERY SCHEME.. AND SHOULD FACE A STIFF SENTENCE NEXT WEEK. NAGIN WILL BE SENTENCED BY JUDGE GINGER BERRIGAN A WEEK FROM TOMORROW. ANALYSTS SAY HE COULD SPEND 15 TO 20 YEARS IN JAIL AFTER BEING CONVICTED ON 20 FELONY COUNTS DEALING WITH BRIBERY. IN THE FILING - LEAD PROSECUTOR MATT COMAN SAYS NAGIN KNEW ABOUT THE BRIBERY SCHEME... AND KNEW HE WAS BETRAYING THE PUBLIC TRUST. IN THE FILING, COMAN ASKED THE JUDGE TO SENTENCE NAGIN TO MORE PRISON TIME THAN OTHER WELL KNOWN PUBLIC CORRUPTION OFFICIALS, LIKE FORMER DETROIT MAYOR KWAME KILPATRICK AND FORMER ILLINOIS GOVERNOR ROB BLAGOJEVICH. KILPATRICK WAS SENTENCED TO 28 YEARS AND BLAGOJEVICH 14. IN THE FILING, COMAN WRITES: "NAGIN'S WIDESPREAD AND CORROSIVE BREACH OF THE PUBLIC TRUST LASTING THROUGHOUT MUCH OF HIS TENURE IN OFFICE EQUALS EVEN THE WORST OF THESE STATE AND LOCAL CORRUPTION CASES. ACCORDINGLY, NAGIN'S CRIMINAL CONDUCT CALLS FOR A SIMILAR SIGNIFICANT SENTENCE OF IMPRISONMENT IN KEEPING WITH THE CITED PUBLIC CORRUPTION CASES." NAGIN REMAINS IN DALLAS AND WILL BE BACK IN NEW ORLEANS NEXT WEEK FOR SENTENCING, OF WHICH WDSU WILL HAVE COMPLETE COVERAGE. BIG CHANGES COULD BE ON THE WAY FOR THE FIRE DEPARTMENT.